What is MIME type "application/x-prql"?

A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.

application/x-prql marks plain text files that include source code written in the PRQL language.
PRQL is a pipeline-oriented query language. It converts human-friendly queries into SQL or similar database instructions.

Query Specification: The MIME type signals that the file contains structured query commands.
Developer Tooling: Editors and IDEs use this identification for syntax highlighting and error checking.
Data Pipeline: It supports a workflow where queries are written simply and then compiled to more complex query languages.
File Identification: It separates PRQL source code from other text files, ensuring proper processing and integration.

Files using this MIME type are marked with the PRQL extension.
For more details, visit the official PRQL website.

Associated file extensions

.prql

Usage Examples

HTTP Header

When serving content with this MIME type, set the Content-Type header:


    Content-Type: application/x-prql

HTML

In HTML, you can specify the MIME type in various elements:


    <a href="file.dat" type="application/x-prql">Download file</a>

Server-side (Node.js)

Setting the Content-Type header in Node.js:


    const http = require('http');
    
    http.createServer((req, res) => {
      res.setHeader('Content-Type', 'application/x-prql');
      res.end('Content here');
    }).listen(3000);

Associated file extensions

.prql

FAQ

What is a MIME type?

A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.

MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.

MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.

How do I find the MIME type for a file?

You can check the file extension or use a file identification tool such as file --mime-type on the command line. Many programming languages also provide libraries to detect MIME types.

Why are multiple MIME types listed for one extension?

Different applications and historical conventions may use alternative MIME identifiers for the same kind of file. Showing them all helps ensure compatibility across systems.